Related Questions

Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?
A Bakelite (phenol formaldehyde)
B Polyester
C Polythene
D Nylon-6
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
A Polythene
B PVC
C Rayon
D Polyvinyl acetate
__________ is an addition polymer
A Nylon
B Bakelite
C Polythene
D None of these
A computer takes 50 nanoseconds to do an 221 addition. How many addition can it do in 1 second?
A 20 million
B 25 million
C 30 million
D 35 million
Which of the following is not a natural polymer?
A Rayon
B Starch
C Cellulose
D RNA
Which of the following is not a polymer?
A DNA
B Glucose
C Starch
D Cellulose
Which of the following is not a polymer of two monomers?
A Teflon
B Bakelite
C SBR
D None of these
Which of the following polymers does not belong to the class of polyacrylate polymer?
A PMMA
B Polyacrylonitrile
C Polyethyl acrylate
D None of these
Which of the following is not a condensation polymer?
A Bakelite
B Melamine polymer
C Polymethylmethacrylate (PMMA)
D None of these

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